The South African species of Caecidae are revised on the basis of the material stored in the KwaZulu-Natal Museum (Pietermaritzburg, South Africa). Twenty species are recognized, 10 of which are described as new: Caecum austrafricanum, C. incisum, C. intortum, C. Knysnaense, C. leilae, C. lindae, C. maraisi, C. morgan, Parastrophia avaricosa and P. ornata. The lectotype of Caecum subquadratum Carpenter, 1859 is herein selected.